By which year has the city of Dubai set goals to achieve Zero-Emissions public transportation?

As per the information given below, the correct answer is option A. Dubai Road and Transport Authority has revealed a plan to have net-zero emission public transport by 2050. The RTA said in addition to the public transport project, it also aims to minimise its carbon footprint in its buildings and waste-management plants. Over the coming year, the RTA plans to decarbonise all taxis, limousines and public buses, design its buildings with near-zero energy consumption, source energy from renewable sources and eliminate municipal waste. It said the strategy would result in reducing carbon dioxide emissions by 10 million tonnes and save Dh3.3 billion. "The new strategy outlines a comprehensive approach to sustainability within RTA," said Mattar Al Tayer, RTA director general. "Its primary objective is to enhance sustainability and reduce carbon dioxide emissions.